Bosch Greenstar FS Bedienungsanleitung

6720810589 (2021/01) CA/US

Operating instructions

Residential Gas Condensing Boiler

Greenstar FS/Combi FS

6720810589-00.2Wo

KBR21/28-/35/42-3A | KWB28/35/42-3A

Contents

Greenstar FS/Combi FS – 6720810589 (2021/01)

Contents

1 Explanation of symbols and safety instructions . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Information about the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.1 Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.2 Proper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.3 Overview of boiler types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3 Prepare for operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3.1 Checking the boiler water pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

3.2 Topping up the heating system water . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

4.1 Overview of controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

4.2 Switching the appliance ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

4.3 Turning the space heating ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

4.4 Programming the heating control unit. . . . . . . . . . . . . . . . . . . . . . . . . . . .17

4.5 KBR..-3A appliances with DHW tank:

Setting the DHW temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

4.6 KWB..-3A appliances (combi boilers):

Setting the DHW temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

4.7 Setting manual summer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

4.8 Setting frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

4.9 Activating the key pad lock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

4.10 Display codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

5 Thermal disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Greenstar FS/Combi FS – 6720810589 (2021/01)

Contents

6 Energy saving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

9 Environmental protection and disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

9.1 Environmental protection and disposal . . . . . . . . . . . . . . . . . . . . . . . . . 31

10 Quick reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Explanation of symbols and safety instructions

Greenstar FS/Combi FS – 6720810589 (2021/01)

1 Explanation of symbols and safety instructions

1.1 Explanation of symbols

Warnings

In warnings, signal words at the beginning of a warning are used to indicate the type

and seriousness of the ensuing risk if measures for minimizing danger are not taken.

The following keywords are defined and can be used in this document:

DANGER

DANGER indicates that severe or life-threatening personal injury will occur.

WARNING

WARNING indicates that severe to life-threatening personal injury may occur.

CAUTION

CAUTION indicates a hazardous situation which, if not avoided, could result in minor

to moderate injury.

NOTICE

NOTICE is used to address practices not related to personal injury.

Important Information

The info symbol indicates important information where there is no risk to people or

property.

Greenstar FS/Combi FS – 6720810589 (2021/01)

Explanation of symbols and safety instructions

Additional symbols

Symbol Explanation

▶Sequence of steps

Cross-reference to another part of the document

•Listing/list entry

– Listing/list entry (2nd level)

Table 1

1.2 Safety instructions

HGeneral information

This manual is available in English and French.

▶ Keep this manual for future use.

▶ Observe the safety instructions of this manual

before putting the heating appliance into operation.

Iftheinformationinthismanualisnotfollowed exactly,

a fire or explosion may result causing property

damage, personal injury or loss of life.

▶ Do not store or use gasoline or other flammable

vapors and liquids in the vicinity of this or any other

appliance.

Explanation of symbols and safety instructions

Greenstar FS/Combi FS – 6720810589 (2021/01)

▶ What to do if you smell gas

– Do not try to light any appliance.

– Do not touch any electrical switch; do not use any

phone in your building.

– Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s

instructions.

– If you cannot reach your gas supplier, call the fire

department.

▶ Installation and service must be performed by a

trained and certified heating contractor, service

agency or the gas supplier.

HIf you smell gas

▶ Turn off the gas shut-off valve.

▶ Open windows and doors.

▶ Do not touch any electrical switch, telephone, and

do not use outlets.

▶ Extinguish all open flames.

▶ Do not smoke!

▶ Do not use lighters!

▶ Warn all occupants of the building, but do not ring

any bell.

Greenstar FS/Combi FS – 6720810589 (2021/01)

Explanation of symbols and safety instructions

▶ From outside the building, call the gas supply

company and a trained and certified installer or

service company.

HIf you smell flue gas

▶ Switch OFF the appliance (page 15).

▶ Open windows and doors.

▶ Inform a trained and certified heating contractor.

HFor appliances operating on room air:

Danger of flue gas poisoning if supply of

combustion air is insufficient

▶ Safeguard supply of combustion air.

▶ Do not cover or reduce the size of ventilation

openings in doors, windows and walls.

▶ Safeguard sufficient supply of combustion air also

for appliances installed at a later date, e.g. kitchen

exhaust fans, clothes dryers, and air conditioning

units with vent to the outside.

▶ Never operate the appliance if the supply of

combustion air is insufficient.

HDanger of explosion of flammable gases

▶ Only employ a trained and certified contractor to

carry out work on the gas train.

Explanation of symbols and safety instructions

Greenstar FS/Combi FS – 6720810589 (2021/01)

HRisk of scalding

▶ If running at DHW temperatures above 104 °F

(40

°C) ask a trained and certified heating

contractor to install a tempering valve to prevent

scalding.

▶ When the thermal disinfection function is

enabled, DHW temperatures above 140

°F (60 °C)

can occur.

HRisk of damage due to operator error

Operator errors can result in personal injury and

damage to property.

▶ Ensure that children never operate this appliance

unsupervised or play with it.

▶ Ensure that only people who know to operate this

appliance correctly have access to it.

HInstallation, conversion

Only have the appliance installed or modified by a

trained and certified heating contractor.

Never modify any parts that carry flue gas.

Never close the outlet of safety valves. Water may be

expelled from any safety valve during heat-up.

Greenstar FS/Combi FS – 6720810589 (2021/01)

Explanation of symbols and safety instructions

HInspection and maintenance

The operator is responsible for safety and

environmental compliance of the heating system.

Sign a maintenance and inspection contract with a

trained and certified contractor, covering an annual

inspection and demand-dependent maintenance.

This guarantees high efficiency and environmentally

sound combustion.

HExplosive and easily combustible materials

Never use or store easily combustible materials

(paper, thinners, paints, etc.) near the appliance.

HCombustion air / room air

To prevent corrosion, keep the supply of

combustion

air / room air free of corrosive substances

(e.g. halogenated hydrocarbons that contain chlorine

or fluorine compounds).

HOverheating of the appliance

Should overheating occur or the gas supply fail to shut

off, do not turn off or disconnect the electrical supply

to the pump. Instead, shut off the gas supply at a

location outside of the appliance.

Information about the appliance

Greenstar FS/Combi FS – 6720810589 (2021/01)

HIn case of water damage

Do not use this boiler if any part has been under water.

Immediately call a trained and certified service

technician to inspect the boiler and to replace any part

of the control system and any gas control which has

been under water.

2 Information about the appliance

2.1 Certifications

This product has been tested and certified for the US and the

Canadian market and complies with all applicable standards

required for the US and the Canadian market.

2.2 Proper use

The appliance may only be installed in closed loop hot water central heating systems.

Any other purpose is considered improper use. Any resulting damage is excluded

from the manufacturer's warranty.

The commercial and industrial use of the appliance for generating process heat is not

permitted.

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